Stephen dudley field



llnrrno TATES STEPHEN DUDLEY FIELD, OF YONKERS, NEW YORK.

ELECTRIC LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent No. 380,880, dated April 10, 1888.

Application filed December 31, 1887. Serial No. 259,467. (No model.)

To aZZ whom it may concern.-

Be it known that I, STEPHEN DUDLEY FIELD, a citizen of the United States, residing in Yonkers, in the county of NVestchester, in the State of New York, have invented certain new and useful Improvements in Electric Locomotors, of which the following isa specification.

The invention relates to the construction of electric locomotors, or vehicles propelled by means of electricity.

The object of theinvention is to provide convenient means for communicating power from the motor to the wheels of the vehicle, which shall be strong and reliable and capable of resisting the great amount of strain which is frequently exerted between the axles of the vehicle and the motor.

The motor itself is carried upon the truck of the vehicle in any suitable manner, being preferably supported from the axles through intervening yielding springs, which allow slight movements. The two wheels of the truck upon one side are connected with each other through crank-arms and a coupling-bar. The motor carries upon its axleat one end a crank-arm which is linked to the crank-arm upon one of the driving-wheels. A strengthening or supporting bar extends from this axle to the axle of the motor, and this serves to hold the two axles at their proper relative distances, thus preventing any twisting or bending of the axles. Preferably the opposite side of the vehicle and corresponding end of the armature-shaft are provided with crankarms and coupling-bars in a similar manner. The crank-arms of the armature are, however, preferably set at a right angle with reference to each other, so as to avoid dead-points in their revolutions.

In the accompanying drawings, Figure l is a side elevation, and Fig. 2 is a plan, of such portions of a locomotor involving the features of the invention as are necessary to illustrate it.

Referring to the figures, O represents the armature of a motor, and B B the field-magnets. These latter are wound so as to pre sent poles N S N S to the armature at the proper points. The axle (J of the armature carries a crank-arm, d, at one end, and, if so desired,.another similar arm may be placed at the opposite end at a right angle therewith, as shown at d The wheels a, a a and a are carried upon axles A and A". They are respectively provided with cranlcarms e e e 6*. The crank-arms e and 6 upon one side of the vehicle are linked by a coupling-bar, (1*, and a similar bar, d couples the crank-arms upon the opposite side. A bar or link, d couples the cranks d and 6 and a bar or link, d couples the cranks (l and 6 upon the opposite side of the vehicle. The cranks d, and d being set at an angle to each other, there will be no dead-points with reference to the movements of the armature.

The motor itself is preferably supported from the axles A and A through yielding springs 13 ]3 and sliding blocks 13, which allow whatever relative movement may be desirable between the parts.

For the purpose of preventing the axles G and A from being bent toward each other or being unduly strained, supports d and (1 extend between the respective axles from opposite ends. These hold the two axles at the proper relative distance from each other, and even though the motor may move upon its support yet the distance between the two axles will be always maintained, and there can be no wrenching or injurious strain between the motor and the axle A and whatever movement of the axle 0 takes place will be in the are of a circle described by the axle A By placing the motor itself very low with reference to the axles A and A the slight movements of the motor upon its supportinging-springs will be in a direction so nearly vertical that there will be no serious displacement of parts.

I claim as my invention" 1. The combination, with an electric motor, of a vehicle carrying the same and supported on springs, a crankarm at each end of the armature-shaft set at an angle with reference to each other, crankarms upon the wheels upon opposite sides of the vehicle, coupling-bars connecting the respective cranks of the motor with the cranks of the vehicle-wheels, sup porting-bars between the axle of the motor and the driven axle, and links connecting the respective vehicle-wheels with other vehiclewheels upon the corresponding sides, substantially as described. r

2. The combination, with an electric motor,

of a truck carrying the same composed wholly 5 or in part of the magnetic frame of the motor resting on springs, crank-arms upon the axles of the motor and of the vehicle, respectively, a link or coupling-bar connecting said crankarms, and a rigid support between said axles,

IO substantially as described.

3. In an electric locomotor, the combination of the armature-shaft, two of the axles of the vehicle, crank-arms upon the respective ends of the armature-shaft, coupling-bars connecting the crank-arms of the armature with crank-arms upon the wheels, and supporting or strengthening bars extending from one axle to the other, substantially as described.

4. The combination of the electric motor 20 having the armature O and its shaft 0 the vehicle having an axle, A, the cranks d and 6 upon the respective axles, the coupling-bar d, and the strengthening or supporting bar d extending from one axle to the other.

5. The combination of the electric motor 25 having the armature O and its shaft 0 the vehicle having an axle, A the cranks d and 6 upon the respective axles, the coupling-bar, the strengthening or supporting bar d extending from one axle to the other, and the link 0 connecting the crank c with another axle of the vehicle, substantially as described.

In testimony whereof I have hereunto subscribed my name this 23d day of December, A.

STEPHEN DUDLEY FIELD.

Witnesses:

E. P. MoFFAT, E. S. REID. 

